Mechanism for turning pump rods and the like



E. W. PIETZSCH KE.

MECHANISM FOR TURNING PUMP RODS AND THE LIKE.

APPLICATION FILED FEB. 2,1922- 1,417,858. P tente 1Ma ;30,-1922.

EDWARD w. P/L'TZSCKE INVENTOR.

ATTORNEX UNITED STATEE PATENT OFFICE.

EDWARD XV. IPIETZSCHKE, OF REDONDO BEACH, CALIFORNIA.

Application fiIed. February 2, 1922.

T 0 all whom it may concern:

Be it known that I, EDWARD W. Pnrrz- SCHKE, a citizen of the United States, and resident of Redondo Beach, county of Los Angeles, State of California, have invented new and useful Improvements in Mechanism for Turning Pump Rods and the like, of which the following is a specification.

It is the object of this invention to provide means for reciprocating pump rods and the like, which will also partially turn the pump rod and working plunger, at each reciprocation of the same, so as to prevent excessive or uneven wearing of the parts.

The invention contemplates the provision of a twisted cable for raising the pump rod, said cable being so arranged that whenunder tension during elevation of the pump rod, it will turn the pump rod with said cable, and thereby shift the wearing surfaces of the reciprocating parts.

The invention also provides a driving connection between the cable and the rod,which will cause turning of the rod with the cable when the latter is under tension, but which will permit of free reverse turning of the cable relative to the rod, when the tension j is released upon downward movement of'the pump rod. By this arrangement, the pump rod will be intermittently turned in one direction only, during operation of the pump. As a result, uneven or excessive wearing of the movable parts of the pump, and of the tubing, is prevented.

The invention will be readily understood from the following description of the accompanying drawings, in which:

Fig. 1 is a perspective view of a device constructed in accordance with the invention.

Fig. 2 is a detail axial section on the line 22 of Fig. 1.

The pump rod l reciprocates in a usual tubing (not shown), and actuates a usual working plunger moving in a usual barrel, which parts are also not shown.

The rod is actuated by a usual walking beam 2, which is raised and lowered by suitable power mechanism, in well known man: ner. The connection between the walking beam and the pump rod is adapted to recip rocate the rod, and at the same time intermittently turn the rodin one direction.

' As an instance of this arrangement, transverse plates 3 and 4 are mounted upon the and cables 5 and 6 are received .over the walking beam, with the ends of the pump rod,

Specification of Letters Patent.

Patented May 30, 1922.

Serial No. 533,734.

respective cables fixed to the ends of the re spective plates.

Each cable comprises twisted strands forming a cable twisted in the same direction throughout its length, and in the present instance shown as a left-hand or clockwise twist. As a result, when a cable is under tension, during elevation of the pump rod with the upwardly moving walking beam, both ends of the cable, fixed to the respective ends ofa plate, tend to untwist or rotate in a right-hand or counter clock-wise direction. But the two ends of the cable are fixed relative to the respective ends of the plate, so that there can be no relative movement between the cable ends and the ends of the plate. The plate however, may turn the ends of the plate, or in other words, at

being fixed against such untwisting movement relative to the plate ends, and such untwisting tendency being in the same direction at the two cable ends, will cause a rela tive twisting tendency between the two cable ends, and thereby rotate the plate upon its axis intermediate of its ends and .at the pump rod.

The respective cables will tend to rotate the respective plates in this manner, and will thereby tend to turn the pump rod upon which the plates are mounted, and as will be hereinafter explained.

It will be obvious, that upon downward movement of the walking beam, and the releasing of the tension upon the cables, there will be a tendency to rotate the transverse plates in the opposite direction, but the driving connection between the plates and the pump rod is so arranged as to only cause turning of the rod with the plates, upon upward movement of the walking beam, and when the cables are under tension. As a result, the pump rod will be turned in one direction only.

The driving connection between the transverse plates and the pump rod, operating as above set forth, may be constructed as follows:

The plates 3 and 4 are loose upon the pump rod, and have a washer 7 between the same, which is also loose upon the rod 1. I A clamp 10 is fixed upon the pump rod above upper plate 3. Thus it will be seen that when the cables draw plates 3"; upwardly,

upon an axis which is at a point between means for the same, means for alternately said tena driving connection is formed between the plates and the rod, through the abutment against fixed clamp 10, and the rod is thus turned with the plates.

lVhen the walking beam moves downwardly, however, the pull upon the transverse plates is released, so that the frictional engagement at clam 10 is broken, and the plates are thus free to turn in the reverse direction without turning rod 1.

I have thus provided a construction wherein the tensioning of the twisted cables during upward movement of the parts, will turn the transverse plates and the pump rod, but the release of said tension upon downward movement of the parts, will permit reverse turning of the plates, without turning movement of the pump rod.

As a consequence, thepump rod and working plunger will be turned slightlyin one direction, at each reciprocation of the mechanism, in orderto distribute the wear. It will be understood that any tendency of the rod to reversely rotate during downward movement of the parts, will be overcome by the frictional engagement of the rod in the tubing.

While I have illustrated and described but one practical embodiment of the device,

it will be apparent that various changes may be made in the construction,combination, and arrangement of parts, without departing from the spirit of the invention.

What is claimed is z 1. The combination with a. member member at opposite sides of its axis of rotation, and means for tensioning said supporting means to cause relative twisting of the same and rotation of said member.

2. The combination with a member adapted to be rotated, of twisted strand supporting means ,therefor'connected to said member at opposite sides of its axis of rota tion, and means for alternately tensioning' said supporting means and releasing said tension to cause relative twisting of said supporting means and turning of said member during said tensioning.

3. The combination with a member adapted to be rotated, of twisted strand supporting means therefor connected to said member at opposite sidesof its axis of rotation, and means for raising said supporting means and then releasing the same to reciprocate said rotatable member, the tensioning of said supporting means during said elevation causing relative twisting of said supporting means and turning of said rotatable member.

4. The combination With a pump rod or the like,

of a twisted cable supporting tensioning said cable and releasing sion, thereby causing turning of the cable in opposite directions, and a connection between said cable and rod adapted to cause turning of said rod with said cable during said tensioning, and free reverse rotation of said cable relative to said rod upon release of said tension. V

5. The combination with a pump rod or the like, of a twisted cable supporting means for the same, means for raising said cable and then releasing the same to reciprocate said rod, the tensioning of said cable and subsequent release of said tension causing turning of the cable in opposite directions, and a connection between said cable and rod adapted to cause turning of said rod with said cable during said tensioning, and free reverse rotation of said cable relative to said rod upon release of said tension.

6. The combination with a pump rod or the like, of a transverse member thereon, a twisted cable supporting means having its ends secured to the ends of said transverse member, and means for tensioning said cable to cause turning of the transverse member and rod. I I

7. The combination with a pump rod or thelike, of a transverse member adapted for frictional engagement therewith, a twisted cable supporting means having its ends secured to the ends of said transverse member, and means'for tensioning said cable to cause turning of the transverse member, and to form a driving connection between said transverse member and rod, so as to turn said rod with said transverse member.

8. The combination with a pump rod or the like, of a transverse member adapted for frictional engagement therewith, a twisted cable, supporting means having its ends secured to the ends of said transverse member, and means for alternately tensioning said cable and releasing said tension to cause turning of the transverse member in opposite directions, the tensioning of said cable forming a driving connectionbetween said transverse member and rod so as to turn said rod with said transverse member, and the release of said tension permitting free reverse rotation of said transverse member relative to said rod.

9. The combination with a pump rod'or the like, of transverse members uponsaid rod, a stop upon said .rod above said trans verse members, a friction washer upon said rod between said transverse members, twisted cables having the ends of the respective cables secured to the ends of the respective transverse members, and means for tensioning said cables to cause turning of the transverse members, and to draw said transverse members toward said stopso as to provide a driving connection between the transverse members and said rod, and thereby turn said rod with said transverse members.

10. The combination with a pump rod or the like, of a stop upon the same, transverse members upon said rod beneath said stop, a friction washer on said rod between said transverse members, twisted cables having the ends of the respective cables connected to the ends of the respective transverse members, and means for alternately tensioning said cables and releasing said tension to cause alternate turning of said trans verse members in reverse directions, the tensioning of said cables also drawing said transverse members toward said stop so as to provide a driving connection between said transverse members and said rod, and thereby turn said rod with said transverse members, the release of said tension disengaging said transverse members from said stop so as to allow free reverse rotation of said transverse members relative to said rod.

11. The combination with a member adapted to be rotated, of a twisted cable supporting means having its ends connected to said member at opposite sides of its axis of rotation, and means for tensioning the ends of said cable to cause relative twisting of the same and rotation of said member.

In testimony whereof I have signed my name to this specification.

EDWARD W. PIETZSCHKE. 

